ruin noun definition in Historic buildings topic from the Oxford Advanced Learner's Dictionary

ruin

 noun: Historic buildings topic
[countable] (also ruins [plural]) the parts of a building that remain after it has been destroyed or severely damaged The old mill is now little more than a ruin. We visited the ruins of a Norman castle. Two bodies were found among the charred ruins of the house. (figurative) He was determined to build a new life out of the ruins of his career.